Gas detection for automotive pollution control

Pijolat, Christophe; Pupier, Christophe; Sauvan, Muriel; Tournier, G; Lalauze, René

doi:10.1016/s0925-4005(99)00220-8

Cited by 123 publications

(57 citation statements)

References 16 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…As a result of the introduction of emergent technologies in the automotive industry, new vehicle diagnostic sensors are at present necessary to control motor functioning, monitor a range of emission gases (NO, NO2, CO, CO2, HC, O2, etc. ), and detect high pollution levels in the vehicle cabin [73].…”

Section: Automotive Applicationsmentioning

confidence: 99%

First Fifty Years of Chemoresistive Gas Sensors

2015

View full text Add to dashboard Cite

Abstract:The first fifty years of chemoresistive sensors for gas detection are here reviewed, focusing on the main scientific and technological innovations that have occurred in the field over the course of these years. A look at advances made in fundamental and applied research and leading to the development of actual high performance chemoresistive devices is presented. The approaches devoted to the synthesis of novel semiconducting materials with unprecedented nanostructure and gas-sensing properties have been also presented. Perspectives on new technologies and future applications of chemoresistive gas sensors have also been highlighted.

show abstract

Section: Automotive Applicationsmentioning

confidence: 99%

First Fifty Years of Chemoresistive Gas Sensors

2015

View full text Add to dashboard Cite

show abstract

“…It should be noted that the sensor shows good response down to 5 ppm of NH3. It is worth mentioning that for automotive industries, the meaningful concentration is from 25 mg/s to 8 ppm [30] and long term allowed concentration is 20 ppm in passenger cabinets [31] for which our sensor showed impressive response of 0.18, 0.20, 0.22 and 0.52 for 5, 7, 8 ppm and 20 ppm, respectively. A maximum response of 0.98 observed for 100 ppm NH3.…”

Section: Cmentioning

confidence: 80%

High Performance CuO Nanorectangles-Based Room Temperature Flexible NH₃Sensor

2017

View full text Add to dashboard Cite

Abstract-Here, we report the fabrication of a flexible room temperature ammonia gas sensor using surfactant-free hydrothermally synthesized copper oxide (CuO) nanorectangles. The structural analysis revealed that the CuO nanorectangles possessed monoclinic structure with an average length and breadth of 950 nm and 450 nm respectively. The specific surface area of CuO nanorectangles was determined to be 29 m 2 /g. The sensor was fabricated on a flexible polyethylene terephthalate substrate by screen printing technique. The room temperature ammonia sensing measurement exhibited significant response down to 5 ppm of ammonia with a quick response time of 90 s and recovered to baseline within 120 s. Maximum response of 0.99 was recorded for 100 ppm of ammonia. The rate constants for adsorption and desorption were estimated for 6.5 to 100 ppm of ammonia from the exponential conductance changes during response and recovery process. The sensor showed appreciable stability and reproducibility of the sensing performance over a period of 3 months. The fabricated flexible sensor demonstrated its ability to detect a wide range of ammonia concentrations at room temperature irrespective of the mechanical deformations applied. Thus, the fabricated sensor is promising and can be suitably employed for practical applications in environments where efficient gas sensing is vitally important.

show abstract

“…However, developing anticipation tools for the early diagnosis of cancer or monitoring air quality, and, in particular toxic vapours, must be more effective in the short-term. In this context the detection of toxic gases, such as ammonia (NH3), is of great interest especially for environmental gas monitoring [6], exhaust gas determination in automobiles [7], leakage detection in chemical plants [8], and product quality assurance in food companies [9]. The limit of concentration of short term exposure to ammonia is 50 ppm for 30 min [10], while for longer times it is only 20 ppm.…”

Section: Introductionmentioning

confidence: 99%

vQRS Based on Hybrids of CNT with PMMA-POSS and PS-POSS Copolymers to Reach the Sub-PPM Detection of Ammonia and Formaldehyde at Room Temperature Despite Moisture

Sachan¹,

Castro

Choudhary³

et al. 2017

Chemosensors

View full text Add to dashboard Cite

Nanocomposite-based quantum resistive vapour sensors (vQRS) have been developed from the assembly of hybrid copolymers of polyhedral oligomeric silsesquioxane (POSS) and poly(methyl methacrylate) (PMMA) or poly(styrene) (PS) with carbon nanotubes (CNT). The originality of the resulting conducting architecture is expected to be responsible for the ability of the transducer to detect sub-ppm concentrations of ammonia and formaldehyde at room temperature despite the presence of humidity. In particular, the boosting effect of POSS is evidenced in CNT-based nanocomposite vQRS. The additive fabrication by spraying layer-by-layer provides (sLbL) is an effective method to control the reproducibility of the transducers' chemo-resistive responses. In dry atmosphere, the two types of sensors showed a high sensitivity towards both hazardous gases, as they were able to detect 300 ppb of formaldehyde and 500 ppb of ammonia with a sufficiently good signal to noise ratio (SNR > 10). They also exhibited a quick response times less than 5 s for both vapours and, even in the presence of 100 ppm of water, they were able to detect small amounts of gases (1.5 ppm of NH 3 and 9 ppm of CH 2 O). The results suggest promising applications of POSS-based vQRS for air quality or volatolome monitoring.

show abstract

Gas detection for automotive pollution control

Cited by 123 publications

References 16 publications

First Fifty Years of Chemoresistive Gas Sensors

First Fifty Years of Chemoresistive Gas Sensors

High Performance CuO Nanorectangles-Based Room Temperature Flexible NH₃Sensor

vQRS Based on Hybrids of CNT with PMMA-POSS and PS-POSS Copolymers to Reach the Sub-PPM Detection of Ammonia and Formaldehyde at Room Temperature Despite Moisture

Contact Info

Product

Resources

About

Gas detection for automotive pollution control

Cited by 123 publications

References 16 publications

First Fifty Years of Chemoresistive Gas Sensors

First Fifty Years of Chemoresistive Gas Sensors

High Performance CuO Nanorectangles-Based Room Temperature Flexible NH3Sensor

vQRS Based on Hybrids of CNT with PMMA-POSS and PS-POSS Copolymers to Reach the Sub-PPM Detection of Ammonia and Formaldehyde at Room Temperature Despite Moisture

Contact Info

Product

Resources

About

High Performance CuO Nanorectangles-Based Room Temperature Flexible NH₃Sensor